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Endosonographic Features of Gastric Schwannoma: A Single Center Experience
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Jong Min Yoon, Gwang Ha Kim, Do Youn Park, Na Ri Shin, Sangjeong Ahn, Chul Hong Park, Jin Sung Lee, Key Jo Lee, Bong Eun Lee, Geun Am Song
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Clin Endosc 2016;49(6):548-554. Published online March 15, 2016
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DOI: https://doi.org/10.5946/ce.2015.115
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Abstract
PDFPubReaderePub
- Background
/Aims: Gastric schwannomas are rare benign mesenchymal tumors that are difficult to differentiate from other mesenchymal tumors with malignant potential, such as gastrointestinal stromal tumors. This study aimed to evaluate the characteristic findings of gastric schwannomas via endoscopic ultrasonography (EUS).
Methods We retrospectively reviewed the EUS findings of 27 gastric schwannoma cases that underwent surgical excision at Pusan National University Hospital during 2007 to 2014.
Results Gastric schwannomas were mainly located in the middle third of the stomach with a mean tumor size of 32 mm. All lesions exhibited hypoechoic echogenicity, and 24 lesions (88.9%) exhibited heterogeneous echogenicity. Seventeen lesions (63.0%) exhibited decreased echogenicity compared to the normal proper muscle layer. Distinct borders were observed in 24 lesions (88.9%), lobulated margins were observed in six lesions (22.2%), and marginal haloes were observed in 24 lesions (88.9%). Hyperechogenic spots were observed in 21 lesions (77.8%), calcifications were observed in one lesion (3.7%), and cystic changes were observed in two lesions (7.4%).
Conclusions During EUS, gastric schwannomas appear as heterogeneously hypoechoic lesions with decreased echogenicity compared to the normal proper muscle layer. These features may be helpful for differentiating gastric schwannomas from other mesenchymal tumors.
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Citations
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